But I have been interested in dreams really since I was a kid. I have always been fascinated by the idea that your mind when you are asleep can create a world in a dream and you are perceiving it as though it really existed.
If there is a book that the script came from you have to read it you have to see what you can get out of it: mood back story and things that may not even be in the film. They kick off your imagination and broaden the character I think.
